Mumford and Sons
The 'I Will Wait' crooners are known for their passionate folk-inspired sound, but that could all change now that the four-piece are working with producer James Ford, who has produced the last four Arctic Monkeys albums and is also known as half of dance duo Simian Mobile Disco.
A source told The Sun newspaper: "His work with Arctic Monkeys is much more rock-sounding than anything Mumfords have done."
The band - fronted by Marcus Mumford, who is married to 'The Great Gatsby' actress Carey Mulligan - released their second studio album 'Babel' in 2012 to rave reviews, but the quartet are now rumoured to be changing their trademark sound in a bid to shock their fans.
Speaking about James' production style, the source added: "But he also has his dance music and pop records on his CV so the music they make together could be very surprising."
Back in July, it was reported that the group had started work on their new album, with a source suggesting that it would be out in 2015.
The source said previously: "Very early work and sessions have begun quietly on album number three. They haven't announced anything officially because they don't want to be under lots of pressure.
"At this point, it's still more likely the album will be released at some point next year - unless things move very quickly."
Tagged in Carey Mulligan Marcus Mumford